From 92d63ccfc7d86d39bc0b806bf7e9fac13dd2d7b5 Mon Sep 17 00:00:00 2001
From: Peter Collingbourne <peter@pcc.me.uk>
Date: Sun, 20 May 2012 18:36:15 +0000
Subject: When legalising shifts, do not pre-build a list of operands which may
 be RAUW'd by the recursive call to LegalizeOps; instead, retrieve the other
 operands when calling UpdateNodeOperands.  Fixes PR12889.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157162 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/X86/pr12889.ll | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 test/CodeGen/X86/pr12889.ll

(limited to 'test/CodeGen/X86/pr12889.ll')

diff --git a/test/CodeGen/X86/pr12889.ll b/test/CodeGen/X86/pr12889.ll
new file mode 100644
index 0000000..331d8f9
--- /dev/null
+++ b/test/CodeGen/X86/pr12889.ll
@@ -0,0 +1,18 @@
+; RUN: llc < %s -march=x86
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@c0 = common global i8 0, align 1
+
+define void @func() nounwind uwtable {
+entry:
+  %0 = load i8* @c0, align 1, !tbaa !0
+  %tobool = icmp ne i8 %0, 0
+  %conv = zext i1 %tobool to i8
+  %storemerge = shl nuw nsw i8 %conv, %conv
+  store i8 %storemerge, i8* @c0, align 1
+  ret void
+}
+
+!0 = metadata !{metadata !"omnipotent char", metadata !1}
+!1 = metadata !{metadata !"Simple C/C++ TBAA"}
-- 
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